Displaceable vehicle seat



July 29, 1952 5, sw 2,604,925

DISPLACEABLE VEHICLE SEAT Filed March so, 1950 s Sheets-Sheet 1 I inn! 7 I g3 34V Z92 2 J p 36 L i 24 24 I :4 E: 25

III 3/7 3 INVEN TOR 32 25 574M EY/z SW/FT E ATTORNEY y 29, 1952 s. H. SWIFT 2,604,925

DISPLACEABLE VEHICLE SEAT Filed March 30, 1950 3 Sheets-Sheet 2 1 N V EN T OR. 33 574M157! SW/Fr E. 7 A TTOP/VEY y 29, 1952 s. H. SWIFT 2,604,925

DISPLACEABLE VEHICLE SEAT Filed March 50, 1950 5 Sheets-Sheet 5 43 4 0 INVENTOR.

' J 57ANLEY/Y5W/F7' A TTOIPNE) 'hicle from'st'o Patented July 29, 1952 I UNIT IST S f orrics -DISI-PLACEABLE vnmoLs snA'r I I "StanleyH. Swift, Saginaw, Michi -II Assumes M enta 1950, Serial No. 152,812"

jThis-invention; relates to a dis laeeable 'drive'rs' seat for a frontfend vending-delivery truckand more particularly relates to a drivers seat which positions thedriver in normal sitting positionto the standard 'steering wheel and standard vehicular controls, -andwhich swings out of normal driving relation'with the steering-*wheel'and controls to a position on'eithersid -of the steering whe'eltofprovide a'clear-ais1e-way in the front portion of the vehicle normally occupied by a .drivers seat for loading and unloading the Vehicle andfor customers to enter the vehicle together with the driver toselect merchandise; I

The utility and-economy'of front end delivery vehicles is well establishedasthese vehicles save the driver much valuable-time and render his work easier sothat he can work more hours per day. The utility of the front end delivery vehicle is occasioned by the fact that th'e'vehicle is driven from the front with the driver necessarily in the front part of the vehicle'to' operate the ve- 'p to stop. ;As the driver is already in the forepartof the vehicle; if he ean'als'o rnake his deliveries from the front'part of the vehicle this saves him'the timeof going around and open,-

ing the rear doorsof th'e v'ehiclel'td get his merchandise; afterthe'" salefreturning the merchandise to therear 'o'f the vehicle, and then returning atesame. I I I I I I I lf deliveries are to be made rr' m the frloiit part or the vehicle, a clear aisle" space is necessitated so: that the driver carr rreew enter' fand leave thevehicle, and, if he desires, havea custo the front thevehicle' to :opertomer enter the vehicle with him," This 'necessar'y-clear aisle space conflicts with the space required for thesteering' wheel, gear shift and necessary seat-for the ordinary vehicle which is driven-from a sitting position; I To'solve thisproblem, various types of movable ,and removableseats have beendeveloped sot hat the olesirediaisle space could be cleared 'by displacing} the seat. Also, elaborate types of standing controls have been developed so that the seat could belcompletely eliminated, thereby' .gaining the necessaryijfree aislespace in the forepart of the vehicle. The deg velopment of the standing control is indicative of the failure of the prior displaceable seats to solve the'problem of clearing the necessary aisle and'also providing a satisfactory seatlfrom which to operate the vehicle; [The standing controls necessitate expensive additional equipment which renders the resultant vehicle excessively costly as compared to a standard controlled vehicle; However, another factor has worked against the 'sucocciipiedinftheiri I I to a non-obstruct ng;inoperative" position; the

r standard controls.

cess of the standing controls,*in 'thatIthedriver fatigues early in the dayjin that he never'is' able to sit while driving the'vehiclel To overcome'jthis objection, removable controls have been developed so that the vehicle seats and a system of dual 'ceu'ld be operated from eitheras-tanding or asit- "ting position but this again involves additional expense. The seats developed for this purpose have=not been satisfactory 'froma drivers standpointfdueftdthe 'fa'ctth'at-the seat has to be laboriously positioned-when the driver wishes to drive'the vehicle from a sitting position.

' It is pertinent to here note that agreat many vehicle seats and -r'niscell'aneous seats have been developed and patented for clearing an aisle-way whichwouldfotherwise be occupiedbythe seat itself-andit is? important 'to recognize that each se 'rwas develobfi for a certain purpose and to fit witha-certain 'enVirOnment or an association of surrounding'elementsto achieve adefinite end. jWh-ile all th'eseats were primarily designed to be erative position, and, to -move positionable to support the driver, and which is quickly and easily positionable to clear the aisle in the front'portion of the vehicle between the steering wheel and the goods-holding portion of the vehicle body. I

An object iof the invention is to provide a seat which: is easily movable from, a normal driving position in a "standard, Vehicle clear of the front doorways ofv the vehicle and clearof the area be-. tween the front doors of the vehicle to provide a clear aisle in the ,forepartof the vehicle between the steering wheelandthe goods-holding portion of theuvehicle body, I 1 f I f object of the ,inventionls ;to provide a seat which positions the driver normally inrelation to I object of the invention is, to provide an inexpensivesimple seat.

I jAn obj ect of the invention is -toprovide a ;,seat I h h na tha n O an? i e pensive, n ?i idzchassist-co mls;midsre airpa tsobject of the invention is to provide a seat provide a seat which automatically unlocks from its driving position when the driver removes his weight therefrom. 1 7

An object of the invention is to provide a seat which is swingable from a position beneath the driver to non-operating position.

An object of the inventionis to p'rovide a seat having a forwardly inclined base so that when the seat is swung from its operating position to a position on either side of the steering wheel,

gravity will-prevent theseat fromswinging from its inactive displaced position. 1

- These and-other objects of the invention will become apparent by reference to the following description ofa front end delivery truck embodying the invention taken in connection with the accompanying drawings in which:

Fig. l is a side elevational view of a front end vending delivery. truck showing the front portion of the vehicle illustrating the inventive seat in driving relation to the standard controls of the vehicle with a driver shown in dotted lines in normal sitting relation to the controls.

Fig. 2 is a viewsimilar to Fig. 1 showing the seat displaced frorndriving position to anonobstructing position at the rightoi the; steering wheel leaving the space clearnormally occupied bya driver's seat in a conventionally controlled vehicle forming an aisle in the forepart of the vehicle between the steering wheel and the goodsholding portion of the vehicle for the; delivery of merchandise and theadmittance of .customers.

Fig. 3 is a view similar to Figs, 1 and 2 showing the seat displaced from driving position to a position at the left of the steerin wheel;

I Fig. 4 is a top plan viewof the vehicle as seen in Fig. lshowing the right and left displaced position of theseat in dotted lines. i v I Fig. 5 is an enlarged sideelevational view of the invented seat, partly in cross-section,- showing the working parts of'theseat and showing the vertical and horizontal adjustment to accommodate drivers ofdifferentsize; the seat being in its lowest adjusted vertical position.

' iFig. 6 is a partial view of the seatshowing the vertical adjustment in its highest position.

Fig. '7 is a front view of the seat partly in elevation and partly in cross section disposed in condition to freely swing-to displaced position.

Fig. 8 is a viewsimilar to Fig. 7 showing the seat in locked driving condition with the drivers weight compressingjthe spring to render the indexing and locking means operable; j 4

Fig. 9 isaibottom view of the'seat showing the horizontal adjusting means, and V Fig. 10 is an enlarged cross sectional view of Fig. 8 taken on the line Hie-l0 thereof showing the disposition of the cross-pin supported on the Referring now to the drawing wherein like numerals refer to like and correspondi Darts throughoutthe several views, the vehicle disclosed therein to illustrate the environment of the invention comprises a standard vehicle '20, Figs. 1

to 4, including a standard flat face cowl 2| constituting th front of the vehicle body, a standard steering gear 22 behind the cowl 2 I, a dropframe floor 23 formed by welding supports to the standard frame of the vehicle below the standard frame and then cutting out the standard frame in the area of the vehicle doorways and floor, a transmission housing 24 extending above the lowered floor 23 enclosing the standard transmission, a propeller shaft ortorque housing 25 leading rearwardly from the transmission housing 24 enclosing the standard propeller shaft, a goods compartment floor 26 positioned on the standard frame contacting the housing 25 so as to house the torque tube rearwardly of the housing 25 and so as to be on a level above the dropped floor 23, a right front door 21 adapted to close the opening 21A in the area of the floor 23, a left front door 28 adapted to close the opening 28A in the area of the floor 23, a standard instrument panel 29, a standard steering wheel 30. The low floor 23 and doorways 21A and-28A permit the driver to enter or leave the vehicle in-standing position with one low step up or down and it is to be noted that the vehicle so far described has a clear aisle way between the steering wheel 30 and thegoods holding area of the vehicle.

'The inventive seat comprises a seat postor socket 3| positioned below the steering wheel 30,

a floor plate 32 welded to the socket 3! which is in turn bolted or welded to the floor 23 of the vehicle-so that-the post 3| is located at a point approximately below the steering wheel 30 and on a longitudinal line in the vehicle extending rearwardly of the steering-gear 22, a spring 33, Fig. 5, disposed within the socket 3|, a sleeve or member 34 telescoping or otherwise suitably arranged with the socket 3! so as to be laterally supported bysaid socket and adapted for free endwiseand rotational movement therewith; the sleeve or member 34 being equipped with a seriesof spaced paired apertures 35 adjacent its top for adjustably receiving and positioning a pin 36 disposed in one pair-of spaced apertures 35. The pin 36 is adapted to bepress fitted or secured to the sleeve 34 with cotter pins orthe like so that the :pin 36 projects sidewise outwardly from the sleeve 34 with the pin projections constituting stops or dogs. The socket 3| is equipped with aligned'notches 31 at its top edge or face suitable to receive the projecting ends of the pin 36 therein to index and lock the sleeve 34 relative to the socket 3| against rotational movement therebetween and to support the sleeve endwise after thespring 33 ha been compressed. I

The outwardly projecting extension or canti leveredarm 38 is welded on the sleeve 34. The base plate 39 is welded on the top'of the arm 38 and is equipped with bolt receiving slots 40 while the seat 41 is positioned on'the base plate 39 and secured thereto to bolts 42 disposed in the slots 40 of the basepla-te 39 with the nuts 43 and the bolts .42 adjustably securing the seat 41 via the slots 40 to the base plate 39. The seat-back 44 is preferably attached to the seat by a rigid-connection to prevent the back from falling down on seat 4| so asto provide means associated with the seat for contacting the instrument panel 29 or the inside of the cowl H to prevent the seat from swinging under the steering gear 22 and to provide hand-high means to a standing person to move the seat toward a proper operating posilOIl.

Referring to Figs. 5 to 10, the seat M can be adjusted toward or away from the steering wheel t -331hy looseningthe nuts 4,3;and1sli'dingtheseat 4| relative to? the plate-33 withrtheseatboits 4:2 travelingiin the plate slots Mtorthe desired position where the. seat M can besecuredby tightenin thenutsfl, .t:

Relative to the vertical adjustment-of therseat 41 to the steering wheel 30, the seriesof' paired pertures 35 .;in;the sleeve provide means. ifO positioning the *pin --3 6 in -the sleeve :34 to; chan e therela'tive' lengthwise .relationzhetween the socket 3| and. the sleeve "3'4; As seen inFig. g6; locating the pin 36 win the ,lowest aperture 35 raises the seat 41 to accommodate a tallperson .Whil boat- :ing the pihsSB in; the highest; aperture 3,6,1Fig. 15.,

' pwers the seatto accommodate arshort person. It is, important to. note that-positioning, the :pin gsfiiinany aperture 35 to T2;iS8"Q1'110W B1 the seat '41 relative to the steerin wheel -:;a'does;. not change the relationship 'ofj-thezp in :3 6, relative to the spring 33; the socket, 3|, or the notch- 3l in thesocketfl. 1' 1 The weight of sleeve 34;;ar-m 38;}plate 39; Seat 4!, andbackM is normally borne-by the spring 33 via the-pin 36-1with the socket laterally supporting the sleeve 34 and associated parts, Figs. 5, 6 ,jand 7, with the'sleeve freely pivotallyudis posed relativeto the spring 33 and-pin 36-resting on the closed and flattened upper end :of the p i g33- it V The seat m a ibeiireely pivoted or grotatedwrelae tive to the socket 13J withthe spring 'iSSliDPOItt ing the pin'36 -above;;theqtop;face of the'socket 31 'well above the :notch;31. and itzis in. this condition that the seat :may be pivoted to either the right or-left of the steering 'wheel 30 of the vehicle;

When itisdesired to "l;1'S8 the seat to operate the vehicle, the driver swings the seat to the rear of the steering wheel and sitsthereon and with h-isweight collapsing- -theyspring33 from;the position shown in Fig. fl t-o the position shown in Fig. -8--with thepin 3'B traveling downwardly-with the sleeve 34;,unti-1 it-enters the notch 31 in the upperedge of the socket 3| which; supports the sleeve 34 and associated parts against further idownwardmovement relativeto the socket 3l.

. .In the event thedriver has not indexed the "Pin 36- with the notch 31', the pin 36 wi1l rest on'the un-notched upper edge or face of the socket 3! thereby supporting the-sleeve 34 -relative-tojthe socket 1 31 and'upongthe driver starting the vehicle in forward motion, the seat will swingi di-' rectly in line with thesteering-wheiel; thereby indexing the'pin 3 6 with the notch 37 to lockthe sleeve 34 to the socket ;3 I against relative rotational rnovement as hereinafter more full-y 'explained.

The socket 3 lis preferably forwardly inclined in the vehicle by inclining the socket foryvarjd 1y relative to thefioor -231or by sloping the floor-itself forwardly so that the-seat; swing-s somewhat downwardly from its operating position rear of the steering wheel to its 1 inoperative position on either side of the steering wheel againstth'e dashboard orinstrument panel where it remains positioned due to the factthat it would have to swin upwardly to returnto its'operatingposition to the rear of the steering wheel. The socket 3-! is' positioned immediately below the steering wheel .and occupies dead space relative to :the aisle-way between the doorwaysZ'IA and 28A and the .outwardly projecting extension .or cantilevered arm 38 provides means forsupporting the seat rearwardly of the steering wheel and means forswinging the seat around the steering'wheel vmerchandise. V Y

'BjspZaL'eing' the seer-teaser the aisle operatinga; vehicle equipped with the invehtive seat, the driver has the optionof etting :ofi'the seat-facing either'doorway 21A or 28A and-in the event :he' desires to face-the left doorway :28A,.d1e raises fhimsfelfhislightly taking his weight loffthe seatLa'l-lowing the spring 33 to drive the sleeve 34' upwardly relative to the socket 3| carrying the pin out ;of :the notch 31; The driver {then-moves :theseat;to his'rig-ht by twisting his body :orrusing his hand. so that the pin 3.6:is out of alignment with the'notch 31; he can then replace fhisweightfln the seat and ride part wayiaroundw-ith the sea-teas it pivots and while it is csorpivoted :he can drop his feet tothe' floor and-move off the seat :andtthe seat will continue to move iinti-lrit {contacts the instrument panel where it-iremains positioned. -When the driver has ridden part :way around withthe seat and socketil carryingxthe "pin ".36' out ofgthe :notch .3 1 thereby permittingthe sleeve-34rto :pivot relative to the socket 31. After the sleeve has pivoted slightly positioning the pin 36 outof v align ment :with the notchc3] the driver can replace his weight on the seat and ride part way around asathefseatpivots towardsithe. dash-board and at any point before the seat passes the steering wheel, he-canslide offfthe'seat in a-standing positionion the :diTOD :fioor .23 facingin thezdee sired directionpand theiise'atwill continue pivoting :until it rjcontactszlthe dashboard .Where'it will remain; .due itouits swinging downwardly" with socket ;3|. However, some driver-sprefer to get off lithe-seat :by. lifting themselves off the seat by positioning'the'ir feet on the toe board of. the veliiclebor on :the flooru23 iinfconjunction with gripping the steering Wheel 33 so that the pin 36 moves out of the notehi3l'as previously described; the driver then swings othe seatout from under himselfito .thezrightlor left. as desired and "the driver thenrstands in the cleared space to the rearr of the'steering wheel' fi'fl previously :occu-.

asfthe ,sleat i4] swings ito its' inopiera'tiveposition on (either side LOf'Xth'e steering wheel 30 Some rlriverszprefer :toi slide lsidewise "oli the seat and then piish the sea-tin the 'desireddirection which is'usnaljly opposite to the.:directionirrzvvhichhe leaves thet'seat. It :can readily'be seenthat no matter :how the driver leaves the seat; the' seat M automatically unlocks and readily; moves 1 to a position on L either :side :01 the, steering wheel 30 out ofthezway of tlietdriver. oc cupyingtdead space 1n the vehicle and cie'ar'ioffthe aisle-f'waiy' between he swings .the seat away from the dash-board by grasping the seat back 44 with his hand, he

then sits on the seat 4i compressing the spring 33 with the sleeve 34 traveling downwardly relative to the socket 3| so that the pin 36 comes into contact with the top edge of the socket 3| @1- enters the notch 31 to lock'the seat directly to the rear of the steering wheel 30. 'In the event that the driver starts the vehicle with the seat not directly to the rear of the steering wheel 30 the pin 36 will support the weight of the driver on the top face'or edge of the socket 3i, and, when the vehicle 'moves forwardly the cantilevered extension or arm 38 in conjunction with the' further extended and cantilevered seat 41 and back 44 acts as a pivoted centrifugal counterweighted member and moves to a position directly opposite the line of force developed by the forwardly moving vehicle which position is directlybehind'the socket j3lfor pivot-point and directly tolthe'rear of the steering wheel 30 in which position the pin 36 is' indexed or aligned with the notch 31 into which it sinks under the weight of 'the driver thereby locking the seat in proper driving position. This feature'is very importantina displaceable drivers seat in that it insures properpositioning and locked driving relation nomatter howhaphazardly the driver positions the seat when he starts 'the'vehicl'e and it is also very important from the drivers standpointof saving time as he does'not have to spend time to carefully align the seat in proper driving position; hey can just swing the seat around andsit in it and let the seat do the rest when he starts the vehicle forwardly.

. Relative to the physical principles and seat structure involved in automatically properly positioning the seatin driving condition if thedriver has not so set the seat, the socket H is positioned between the steering wheel 30 on a longitudinal linein the vehicle withthe center ofthe steering wheel 30. Due to the'projecting extension or cantilevered. arm 38 and'the further projecting and cantilevered seat 4| "and back 44, if the 'seat is not properly positioned it is not on the vehicular longitudinal: line pivoted with the socket 3|, 1. e., it is toone side or .the' other of the line. When standing, gravity provides inertia in the vehicle seat and driver. When the vehicle starts forwardly inertia is overcomeby forward force and momentum developed. If the seat is to one side of the line it is free to swing'as it is not locked and the inertia of the seat and driver persists until overcome by the forward force by a positive mechanical connection such'as by travcling to "dead 1 center opposite "the direction of force, 1. e., moving to the vehicular longitudinal line at whichthe'pivot point'is located, which isa point directly to the rear" of the socket 3| directly-behind the steering wheel '30, which is the proper driving condition of the Seat in relation to the vehicle and is'the point at which the seat automatically locks against pivoting. In other words, the pivoted cit-center arm and seat in conjunction withthe forward motion of the vehicle is capable of developingcentrifugal force tomove the *seat'and drive it to a position-directlybehind the steering'wh'eel. r M- Although but a single embodiment of the invention has been shown and described in detail, it is obvious that many changes maybe made in'the size, shape, detail and arrangements of the elements of the invention within the scope of the appended claims. 7

"I'claim: I I

1. In a front end delivery truck having a standard steering column and a standard steering wheel and having clear aisle space in the area normally occupied by the drivers seat, a socket positioned in the vehicle rearwardly of the steering column approximately on a longitudinal-line extending rearwardly from the steering column and approximately" directly below the steering wheel'of the vehicle, said socket being forwardly inclined in the truck and having a notchin the upper edge of the side wall, a spring disposed within and supported relative'to said socket, a sleevedisposed within and laterally supported by said socket surrounding said spring adapted for sliding endwise and rotational movement relative to said socket, a pin through said sleeve adjacent its top and projecting sidewise outwardly from said sleeve; said pin being adapted to have its middle area rest on said spring to vertically support said sleeve in elevated relation to said socket with the projecting portion of said pin in spaced relation from the notched upper end of said socket and with the bottom end of said sleeve in spaced relation above the bottom of said socket, an outwardly cantilevered extension I on said sleeve, a seat on said'extension; said spring being adapted to be compressed under the weight of a driver sitting on said seat to allow said sleeve to slide downwardly relative to said socket to carry the outwardly projecting portion of said pin into the area of the notch in said socket thereby limiting the downward movement of said sleeve preventing relativerotation between said socket and said sleeve and locking said seat in driving relation with the vehicle, said spring being capable of driving said sleeve upwardly when the drivers weight is removed from said seat to dislodge said pin projection from the notch of said socket to free said sleeve for rotational movement relative to said socket; said outwardly cantilevered extension and said sleeve providing a swinging arm relative to said socket for swinging said seat from a driving position to a position on either side of the steering wheel of the vehicle to clear the space normally occupied by the driversseat to provide an aisle in the fore-portion of thevehicle; said inclined socket together with said extension comprising means for said seat to swing downwardly toward the front of the vehicle and to prevent said seat from swing ing back into driving position; said extension constituting alever capable of generating centrifugal force in conjunction with the forward motion of'the vehicle toswing said seat into driving position to align the projecting end of said pin with the notch in said socket to lock said seat in driving position.

2. A displaceable drivers seat for use in a vehicle having a steering column and a steering wheel and having clear aisle space in the region normally occupied by the drivers seat, comprising a socket positioned in the vehicle approximately on a longitudinal line extending rearwardly from the steering column and approximatelyfdirectly below the steering wheelof the vehicle, a spring disposed at said socket, said socket having means supporting said spring, a slidable sleeve laterally supported by said socket and resiliently vertically supported by said spring, an extension on said sleeve, a seat on said extension; said spring being adapted to be compressed under the weight of a driver sitting on said seat to allow said sleeve to slide downwardly relative to said socket; said spring being capable of driving said sleeve upwardly when the drivers weight is removed from said seat; indexing means locating said seat in driving relationship along said longitudinal line to the vehicle steering wheel rendered operable by the drivers weight on said seat; said sleeve extension being outwardly cantilevered providing a swinging arm relative to said socket for swinging said seat from a driving position to a position on either side of the steering wheel of the vehicle to clear the space normally occupied by the drivers seat; said seat having a back rest which clears the steering wheel as the seat is swung into inoperative position.

3. In a device as set forth in claim 2, said socket being forwardly inclined to allow said sleeve extension to swing downwardly towards the front of the vehicle by gravity in the absence of centrifugal force and to prevent said extension from swinging back to driving position when the vehicle is standing.

4. In a device as set forth in claim 2, said extension constituting a lever capable of generating centrifugal force in conjunction with the forward motion of the vehicle and the inertia of the seat to swing said seat into driving position to align said indexing means to locate said seat in driving position along said longitudinal line where said means lock automatically under the weight of the driver.

5. A displaceable driver's seat for use in a vehicle having clear aisle space in the region normally occupied by the drivers seat, a primary support post positioned in the vehicle approximately on a longitudinal line extending rearwardly from the steering column and approximately below the steering wheel of the vehicle, a second post telescoping with said support post adapted to move up and down relative to said support post, an outwardly projected cantilevered extension on said second post, a driver's seat mounted on said extension, a spring means supporting said second post in relation to said support post, means associated with said posts for indexing said seat in driving relation to the steering wheel along said longitudinal line; said spring being adapted to collapse under the weight of a driver sitting thereon to render said indexing means operable; said outwardly projecting canthe vehicle steering wheel, and, when out of driving position, constituting means to develop centrifugal force in conjunction with the inertia of the seat under accelerating forward motion of the vehicle to rotate said second post in relation to said support post to position the seat behind the steering wheel and to align said indexing means; said seat having a back rest which clearsthe steering wheel as the seat is swung into inoperative position.

6. A displaceable driver's seat for use in a vehicle having clear aisle space in the region normally occupied by the driver's seat, a forwardly inclined post positioned in the vehicle approximately on a longitudinal line extending rearwardly from the steering column and approximately below the steering wheel of the vehicle, a second post telescoping with said forwardly inclined post and interfitting with said forwardly inclined post in up and down sliding relation therewith, indexing means for locking both said posts in driving relationship, spring means supporting said second post so as to normally disassociate said indexing means, an outwardly cantilevered extension onsaid second post, and a seat on said cantilevered extension; said cantilevered extension and seat acting as a lever to rotate said second post in relation to said first post to rotate said seat and cantilevered extension from normal operating position behind the steering wheel to a position on either side of the steering wheel secured by the forward inclination of said first post when the vehicle is standing whereby the region normally occupied by the driver's seat of a vehicle is cleared, said spring means being adapted to collapse under the weight of a driver sitting on said seat to render said indexing means operable.

STANLEY H. SWIFT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Muma May 31, 1941 

